Ingenious Hack for Sketching with Two Point Perspective Using an Elastic String

This quick video demonstrates how to use a long elastic string anchored at the horizon of a canvas to sketch a drawing with two point perspective. With as many art and drawing classes I’ve taken, I’ve never seen this method used before. A more traditional and accurate method would involve a ruler and maybe a drafting table if you’re super fancy, but this seems like a great method for mocking up something quickly. The video posted on Facebook is uncredited and apparently came from Instagram. Anyone know the artist/designer? (via Reddit, The Awesomer)